Diphosphine Complexes of Nickel(II) Are Efficient Catalysts for the Polymerization and Oligomerization of Ethylene: Steric Activation and Ligand Backbone Effects

Nickel(II) complexes of ligands of the type Ar2PCH2PAr2 and 1,2-Ar2PC6H4PAr2 (Ar = ortho-substituted phenyl) are active catalysts for polymerization and oligomerization of ethylene.